71930 CDGC/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
Ball & Washer Dimensions
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71930 CDGC/P4A Bearing Product Overview & Core Advantages
The 71930 CDGC/P4A is a single-row angular contact ball bearing engineered for high-precision applications demanding exceptional rotational accuracy and rigidity. Operating under a P4A tolerance class, this bearing is designed to handle significant combined loads (radial and axial) simultaneously, making it ideal for high-speed spindles and precision machinery. Its moderate preload (Class C) ensures optimal stiffness and minimizes deflection under operational stresses. The bearing is universally matchable (SU), allowing for precise axial preload adjustment when mounted in pairs or sets, a critical feature for achieving superior system performance and longevity.
71930 CDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71930 | Basic bearing series and size designation | Defines the core dimensions: 150mm bore, 210mm OD, 28mm width. |
| C | 15° Contact Angle | Optimized for high-speed operation and axial load capacity. |
| DG | Universal Matchable bearing (SU designation) | Allows for flexible mounting in pairs or quadruplex sets to achieve specific preload and rigidity. |
| C | Moderate Preload (Class C) | Provides enhanced stiffness and reduces runout for improved machining accuracy. |
| P4A | High Precision Tolerance Class | Guarantees extremely tight dimensional and running accuracy, suitable for the most demanding applications. |
71930 CDGC/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The 15° contact angle and moderate preload are key to this bearing's high rigidity, enabling it to resist deformation under heavy combined loads. With a dynamic load rating of 25,650 lbf and a static load rating of 29,700 lbf, it offers reliable performance in strenuous conditions.
Optimized High-Speed Performance: The phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces and stable operation at high speeds, with a limiting speed of 11,000 rpm. The open seal design minimizes friction and heat generation, further supporting its high-speed capabilities.
Precision and Durability: Manufactured to P4A precision standards with tight tolerances on all dimensions, this bearing ensures minimal vibration and high running accuracy. Components made from chrome steel provide excellent wear resistance and long service life.
71930 CDGC/P4A Bearing Typical Application Areas
The 71930 CDGC/P4A is ideally suited for high-performance machinery where precision and speed are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and rotary actuators requiring high accuracy and rigidity.
- High-Frequency Motors and Spindles: Applications demanding minimal runout and vibration.
- Aerospace and Defense Systems: Gyroscopes, radar platforms, and other precision instrumentation.
